WO2005064760A1 - Appareil pour la protection de dispositif de communication de la foudre et de surtension - Google Patents

Appareil pour la protection de dispositif de communication de la foudre et de surtension Download PDF

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Publication number
WO2005064760A1
WO2005064760A1 PCT/KR2004/003487 KR2004003487W WO2005064760A1 WO 2005064760 A1 WO2005064760 A1 WO 2005064760A1 KR 2004003487 W KR2004003487 W KR 2004003487W WO 2005064760 A1 WO2005064760 A1 WO 2005064760A1
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WO
WIPO (PCT)
Prior art keywords
unit
ground
lines
surge
protection unit
Prior art date
Application number
PCT/KR2004/003487
Other languages
English (en)
Inventor
Byeong-Woo Lee
Sun-Ho Kim
Original Assignee
Datos Co., Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020040058605A external-priority patent/KR100476696B1/ko
Application filed by Datos Co., Ltd filed Critical Datos Co., Ltd
Publication of WO2005064760A1 publication Critical patent/WO2005064760A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/18—Automatic or semi-automatic exchanges with means for reducing interference or noise; with means for reducing effects due to line faults with means for protecting lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
    • H04M1/745—Protection devices or circuits for voltages surges on the line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2207/00—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place
    • H04M2207/20—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place hybrid systems
    • H04M2207/203—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place hybrid systems composed of PSTN and data network, e.g. the Internet

Definitions

  • the present invention relates, in general, to an apparatus for protecting communication equipment from lightning and surges that is capable of grounding balanced lines without the influence of noise at the time of realizing a ground so as to improve the stability of a network by preventing various noise, lightning and surges in the network using a balanced cable, such as telephone lines or a UTP cable, and, more particularly, to an apparatus for protecting the terminals of x Digital Subscriber Line using a telephone signal and a data signal in an overlapped fashion and dedicated lines using a balanced cable from lightning and surges .
  • a balanced cable such as telephone lines or a UTP cable
  • a data communication method utilizing a balanced cable that can be applied as telephone class lines in particular, a communication method using x Digital Subscriber Line (xDSL) , in which telephone signals and data signals are overlapped, and a balanced cable, there are a low voice signal reaching several dB and a 20 Hz, 80 V ring signal and a 48 V DC current on a telephone side, thus utilizing a ring signal ranging from 16 Hz to 20 Hz and a small frequency range from 300 Hz to 3,400 Hz.
  • the communication method is characterized by a wide voltage level described above.
  • ADSL utilizes a range of 30 KHz to 1 MHz and VDSL utilizes a wide range frequencies ranging from the ADSL range to 12 MHz, and only data signals are used, so that it can be mentioned that a voltage range is more stable than a voltage level .
  • xDSL in which two types of signals having different characteristics coexist, there exists a historical background on which the telephone technology developed along with the communication history is combined with the data technology recently put to practical use, and technologies applied to xDSL are very different, in addition to the characteristics of the used signals. Accordingly, unlike the conventional technology, the necessity of special demand for protection against lightning and surges with respect to data is described in detail below.
  • telephones can be constructed using a handset based on a carbon material, hybrid coils for performing matching and transmission, and a circuit used to construct a bell. It is prescribed that a protective discharge tube on a telephone side "must not discharge at 179 V, but must discharge at lower than 600 V (KT- 5805-0761) .” In accordance with the ITU-T recommendation K. 12, it is prescribed that, in the case of a standardized gas discharge tube for 250 V/3 P, a maximal impulse discharge initiation voltage is in the range of 1000 V/ ⁇ s to 900 V/ ⁇ s.
  • an installed lightning and surge protection apparatus has a margin of 180-300 V between the line and the ground, and a margin of 600 V between the lines.
  • two gas discharge tubes having a standard of 230 V are configured in series and are then used.
  • IEC 61000-4 tests proved that a residual voltage higher than 1,500 V existed when a surge voltage of 4,000 V is applied.
  • FIG. 1 is a diagram showing the construction of the circuit of a conventional protection apparatus for telephone lines, which employs gas discharge tubes.
  • FIG. 2 is a circuit diagram of an ADSL modem that uses telephone lines as communication lines while sharing the telephone lines .
  • two telephone lines Li and L 2 are connected to a modem 4 through a primary protection unit 1 composed of a gas discharge tube G A , a current limiting unit 2 using a resistor, a PTC element or a common mode choke coil 2, and a secondary protection unit 3 composed of a single surge limiting element TNR 3 connected in parallel between the lines and two surge limiting elements TN i and TNR 2 connected in series between the lines .
  • the gas discharge tube G A of the primary protection unit 1 functions to block an overvoltage high than several hundred V, and one of a resistor, a PTC element or a choke coil may be used as the current limiting unit 2.
  • the secondary protection unit 3 functions as a limiter that blocks a high voltage higher than several hundred volts generally using three surge limiting elements TNRj., TNR 2 and TNR 3 .
  • equipment such as the protection apparatus employing gas discharge tubes or the ADSL modem, generates high frequency pulses (discharge pulses) of several volts according to the discharge characteristics of the gas discharge tubes in which a discharge and a recovery are repeated at the time of AC contact or the inflow of a ground fault.
  • the equipment acts as an oscillator for a high frequency and a high voltage that can easily pass through the coupling transformer of a modem or the like through which a commercial AC voltage cannot pass, so that it becomes a factor in the breakage of the modem.
  • the surge limiting elements TNRi, TNR 2 and TNR 3 do not perform a limit function on a low voltage, but performs a limit function on a high voltage at a 270 V level. With respect to a strong surge of 1000 V/ ⁇ s, a residual surge of several hundred volts remains, so that only a protection effect at a low level is expected. Accordingly, although many attempts to lower the limiting voltage of the secondary protection unit have been made, interference with a ground or frame ground occurs, so that a problem occurs in that noise occurs in telephone lines due to the correlation between equipment connected to the frame ground and an EMI filter. From tests for proving the above description, it could be frequently found that the ADSL modem stopped its function due to the loss of a process and a ping test was discontinued.
  • a power voltage of +5 V in the ADSL modem was lowered to negative several volts due to the inflow of a surge.
  • the cases of damage caused by the above-described factors include frequently occurring failures in which the Internet is disconnected in ADSL and VDSL, failures in which a connection is not made and a normal operation is performed by a reset operation, and failures in which settings must be reset by a reset operation.
  • Such a failure pattern can be verified by the failure statistics of a company that is providing an ADSL service in Korea.
  • an object of the present invention is to provide an apparatus for protecting communication equipment from lightning and surges, in which a protection device, which must be installed in a communication inlet part, is provided in the lightning and surge protection apparatus, so that protection against lightning and surges can be achieved in regions relatively vulnerable to lightning and surges, such as farming and fishing villages and small towns having insufficient ground and protection facilities .
  • a detailed object of the present invention is to provide a technology that provides a fundamental measure for protection against ground faults, power line contact and incoming surges by preventing the generation of a residual voltage and discharge pulses after the discharge of a gas discharge tube, transmits effective telephone signals to a telephone in a range that gives influence, such as attenuation, and gives protection against lower electrical potential for precise protection for a data side.
  • a further object of the present invention is to provide an optimal measure for protection against lightning and surges in a non-ground mode when providing a technology that blocks a 48 V DC voltage, a 80 V ring AC signal and a voice signal without attenuation, effectively limits surge components without causing the attenuation of data signals, and overcomes the potential difference between communication lines and power lines by implementing a pseudo-ground between all elements as well as communication lines .
  • the present invention provides an apparatus for protecting communication equipment from lightning and surges, including a primary protection unit 11 for protecting circuits from an overvoltage that enters through an inlet side telephone line; a current limiting unit 12 for limiting the overvoltage having passed through the primary protection unit 11 to a predetermined value; a high-pass filter unit 13 for separating only high frequency data signals from various signals that enter through telephone lines; an interface unit 14 connected to the high-pass filter unit 13 to eliminate line noise, adapted to implement a pseudo-ground by realizing equal potentials between the lines and a ground, and adapted to transmit the data signals to an output unit; a secondary protection unit 15 for blocking surge voltages transmitted to a modem 16 and a computer 17 by suppressing the residual potential of the primary protection unit 11 behind the interface unit 14; a low-pass filter unit 22 for separating only low frequency voice signals from various signals that enter through telephone lines while selectively connecting behind the primary protection unit 11 or current limiting unit 12 and transmitting the separated signals to a telephone 24; a voice protection unit
  • the high-pass filter unit 13 includes two condensers Cu and C 12 connected in series to tip and ring lines, respectively, and a single coil L 21 connected in parallel between the tip and ring lines .
  • the current limiting unit 12 is represented by two coils LZu and LZ ⁇ 2 in the drawing, which have characteristics effective to the reduction of common mode noise entering through lines and a current limiting function with respect to a surge level as common mode choke coils, and may be replaced with two resistors if common mode noise does not cause a problem.
  • the coil L 2i of the high-pass filter unit 13 is characterized by being replaced with the coils L 22 and L 23 of the interface unit 14 and being omitted.
  • the two coils L 22 and L 23 of the high-pass filter unit 14 may be replaced with a single coil having both terminals and a neutral point, which may be used as an element, that is, the above- described high-pass filter unit, and eliminates noise entering through the lines by short-circuiting the lines and a ground using low impedance with respect to high frequency components, that is, 60 Hz 110 V components and their harmonic components induced to the ground or frame ground.
  • This causes a line potential to be equal to individual devices and the ground using a pseudo-ground, thus eliminating a cause that prevents a second limiting voltage from being low.
  • the present invention is characterized by suppressing lightning and surges to a low potential level lower than a commercial signal level on a telephone side by separating only high frequency signals while blocking ineffective telephone level signals without loss using the high-pass filter unit and the limit elements of a secondary protection unit. Furthermore, the present invention is characterized in that a power source side surge protection unit 20 is further included on the power inlet side of the computer 17 and the ground of the power source side surge protection unit is connected to the pseudo-ground 21.
  • the present invention provides a lightning and surge protection method in regions relatively vulnerable to lightning and surges, such as farming and fishing villages and small towns having insufficient ground and protection facilities, and provides a fundamental measure for protection against ground faults, power line contact and continuously incoming surges. Furthermore, the present invention provides a precise surge protection technology to a data communication equipment side sensitive to surge protection compared to a telephone side, and provides a technology capable of eliminating the potential difference between communication lines and power lines using a coil connection circuit for the balance of a pseudo-ground and the lines as well as a protection function for the communication side and the power source side, thus providing an optimal measure for protection against lightning and surges in a non- ground mode.
  • FIG. 1 is a diagram showing the construction of a conventional basic lightning and surge protection apparatus for conventional telephone lines
  • FIG. 2 is a diagram showing the construction of a conventional lightning and surge protection apparatus for conventional xDSL lines
  • FIG. 3 is a block diagram of a lightning and surge protection apparatus for communication equipment in accordance with an embodiment of the present invention
  • FIG. 4 is a circuit diagram of the lightning and surge protection apparatus for communication equipment in accordance with the embodiment of the present invention
  • FIG. 5 is a view illustrating a ground implementation method using common ground distribution that is applied to the present invention
  • FIG. 6 is a view showing the construction of SMPS that is used for xDSL according to the present invention
  • FIGS. 7(a) to 7(c) are diagrams showing the characteristics of surge waveforms to illustrate the present invention.
  • FIG. 3 is a block diagram showing an apparatus for protecting communication equipment from lightning and surges.
  • telephone lines Li and L 2 are connected to a primary protection unit 11, a current limiting unit 12 for limiting current, a high-pass filter unit 13 for passing only a data communication signal therethrough, an interface unit 14 for maintaining equal electrical potential between a line and a ground wire, removing noise from a ground wire or virtual ground wire, and coupling a data signal to an output terminal, and a secondary protection unit 15 for suppressing surge potential to a protection level at which a modem 16 can operate safely.
  • the modem 16 is connected to the output sides of the telephone lines Li and L 2 .
  • a Personal Computer (PC) 17 is connected behind the modem 16.
  • the power supply is designed so that power can be supplied from power lines through a power source side surge protection unit, that is, a distribution panel, to the PC 17 and through an adaptor 19 to the modem 16.
  • a low-pass filter 22, a voice protection unit 23 and a telephone 24 are connected in parallel behind the primary protection unit 11 or the current limiting unit 12, thus protecting against surges transferred from the low-pass filter 22 and the voice protection unit 23 to the telephone.
  • the ground wires of the primary protection unit 11, the interface unit 14, the secondary protection unit 15, the modem 16, the PC 17, the voice protection unit 23 and a power source side surge protection unit 20 are connected in common to a pseudo-ground 21, so that they are in an equipotential state.
  • the apparatus includes two gas discharge tubes G & i and G ⁇ that are connected in series between telephone lines Li and L 2 and are connected to a virtual ground G at a central connection point between them, a primary protection unit 11 that is composed of a gas discharge tube G A3 connected between the ends of the lines, and a current limiting unit 12 that is connected behind the primary protection unit 11 and is composed of common mode choke coils L Z n and L Z ⁇ 2 , so that the balancing of the two lines, the attenuation of in-phase noise and the restriction of surge-level current can be achieved.
  • a high-pass filter unit 13 for blocking Direct Current (DC) components and low frequency components is composed of a structure in which two condensers Cn and C 12 and a coil L 2 ⁇ are connected in a differentiator form.
  • An interface unit 14 is composed of two coils L 2 and L 23 and a transformer Ti.
  • the two coils L 22 and L 23 may be replaced with a single coil having a positive terminal and a neutral point.
  • the coil may include the function of the coil L 2 ⁇ that is a component of the high-pass filter unit 13.
  • the transformer Ti is necessary in terms of a function but may be omitted in practice .
  • a secondary protection unit 15 to be connected to the modem 16 is connected behind the transformer Ti, and protects the modem 16 by suppressing residual voltage after discharge in the primary protection unit 11 to such a low level so as not to influence the modem.
  • the low-pass filter unit 22 includes coils Lu and L ⁇ 2 and a condenser C x that are connected to two lines behind the current limiting unit 12, and the voice protection unit 23 includes two surge limiting elements Ml and M2.
  • the primary protection unit 11 composed of the gas discharge tubes Gfeu .
  • G M and G M that is, elements for protecting against transient voltage that may be input to telephone signals and data through the telephone lines Li and L 2 , is provided in the protection apparatus, so as to provide for the case where telephone protection apparatuses are not installed, as in farming and fishing communities and small towns .
  • a power source side surge protection unit 20 is provided to cope with the ingress of a surge from a power source side, and the pseudo-ground 21, in which the ground wires of the respective components are connected in common, so that a ground function is achieved using only a chassis ground, is constructed in a ground mode to allow smooth operation.
  • the customer premise protector is used.
  • the low-pass filter unit 22 for identifying effective signals from the point of view of the telephone 24 is constructed.
  • the low-pass filter unit 22 employs a low-pass filter technology.
  • the low-pass filter unit 22 is implemented in a combination limiting technology and filter technology form. In this case, the limiting technology acts as a surge suppression technology, and is invented to coincide with a data level surge protection technology and achieve the purpose of the present invention. With reference to FIG. 4, the present invention is described in detail below.
  • the low-pass filter unit 22, which is a voice filter circuit handling voice level signals, is a low- pass filter that is composed of the coils Ln and L i2 and a condenser Ci.
  • the pass frequency band of the low-pass filter unit 22 corresponds to DC and ring and voice signals, the frequencies of which are each less than 4 KHz. Accordingly, it can be understood that DC 48 V, that is, a voice level signal, and ring and voice signals can be coupled to the telephone 24. Meanwhile, when discharge is performed in the gas discharge tubes G A ⁇ , G A2 and G ⁇ of the primary protection unit 11, a discharge residual voltage in a range of several hundreds V to 1,500 V may remain. The discharge residual voltage is limited to a predetermined range (approximately 15 V) by the limit elements Z ll7 Z 12 and Z i3 of the secondary protection unit 15.
  • the limitation is exerted from an electrical potential lower than the limiting voltage of the limit elements Z , Z i2 and Z 13 , that is, approximately 15 V, by the coils L 2 n and L Z ⁇ 2 of the current limiting unit 12.
  • the high-pass filter unit 13 passes only the data signals, that is, harmonic signals, of signals that are input through the telephone lines, therethrough.
  • a data line side is normal, a problem does not occur.
  • the present invention enables a limitation in a range of several mV using the high-pass filter.
  • the voltage limiter of the secondary protection unit 15 has a function of suppressing all the signals, which have passed through the high-pass filter, to a standard voltage level. When a level is lower than a reference level of several V, the limiter does not operate. However, if a voltage higher than the reference voltage is applied, the limiter is operated and, therefore, suppression to a level lower than the reference level is performed, thus preventing a surge higher than the reference level from being output. Accordingly, a ring signal can be eliminated up to several hundred mV while a voltage lower than the voltage limit range (here, 15 V) of the secondary protection unit 15 is high-pass filtered through the condensers Cu and C 12 of the high-pass filter unit 13 and the coil L 2 ⁇ .
  • a DC voltage of 48 V is blocked by the condensers Cu and C 12 , a voice signal is blocked by the high impedance of the high-pass filter unit, and a ring signal passed through with high impedance and input to the data side is checked by the high-pass filter unit.
  • high voltage lightning, a surge, a ground fault current, a power line contact current, a discharge residual voltage or a discharge pulse enters, it is blocked by the limiter function, so that the communication equipment can be protected.
  • an AC 110V component may be induced from the power source side to the line of the pseudo-ground 21 due to a frame connection.
  • a potential difference is generated between tip-ring lines by the end voltage of the two limit elements Zu and Z i2 , and is induced to the telephone lines Li and L through the condensers Cu and C X2 in the form of noise, and, therefore, may cause noise in telephones.
  • noise that is, a low frequency component (60 Hz and its harmonic component) induced from a pseudo-ground line, is eliminated by short circuit.
  • the present invention is described in detail below on a theoretical basis.
  • a representative waveform of a surge is as defined in IEC62-41, which is represented by the following equation.
  • FIGS. 7(a) to 7(c) are example views of a surge waveform.
  • the telephone 24 connected to the low-pass filer unit 22 has a high surge impedance, so that no problem is caused.
  • the data side circuit having the high-pass filter unit 13 produces results that are still influenced by a surge. The above description is examined in conjunction with the characteristics of the surge below.
  • the xDSL overlapping a balanced cable that are used as telephone lines it is constructed as shown in FIG. 3, so that it is characterized in that the danger of lightning or a surge is relatively low, but inflow from communication lines and power lines is high.
  • a surge induced between the lines In the case of a surge induced between the lines
  • the level at which the primary protection unit 11 operates is theoretically 460 V.
  • a surge lower than the above-described surge, there is no discharge of the primary protection unit 11, so that the surge is applied both to a telephone and to data.
  • a discharge is generated in the primary protection unit 11.
  • a voltage before a discharge (a discharge residual voltage) and a pulse (a discharge pulse) voltage during a discharge are high frequency voltages, and enter through telephone side and data side paths . Since the telephone side low-pass filter unit 22 composed of coils L :1 and L 12 and a condenser d .
  • the high frequency voltage is passed through the condensers Cu and C 12 , so that the high frequency voltage is limited to a reference voltage by the limit elements Zu, Z 12 and Z 13 or is limited to the surge impedance level of the elements.
  • the limit elements Zu, Z 12 and Z 13 may have a limit function or a trigger function.
  • Output characteristics are limited by a reference voltage or the internal resistance of the elements with respect to the transient characteristics of the elements .
  • a residual voltage appearing on an output side is determined by the following Equation.
  • Vi refers to a voltage on the input sides of the limit elements, that is, a voltage on a high-pass filter side
  • a desired voltage limit value for example, 15 V
  • the current limiting unit 12 is provided to the lines L x and L 2 , so that a phenomenon in which a limiting voltage increases due to the internal resistance values of the limit elements Zu, Z 12 and Z ⁇ 3 and the internal resistance values of the elements of the high frequency filter unit can be compensated for.
  • the PC 17 is protected by the operation of the power source protection unit 20.
  • an excessive potential difference that is, lightning or a surge, enters between the communication line Li and the earth, no current passes through equipment having no power source, such as a telephone, in the case where there is no appropriate discharge route, and, therefore, the equipment is not damaged.
  • FIG. 5 is a diagram illustrating a ground implementation method based on a common ground distribution scheme that is applied to the present invention. As shown in the drawing, a communication line
  • a ground wire 104 is connected from the communication pole 101 to a ground rod 104a embedded in the ground, the ground wire 104 branches off and enters the home along with the communication line 103.
  • a ground wire 204 is connected from another communication pole 201 to a ground rod 204a embedded in the ground.
  • a ground distribution terminal 202 is mounted on the communication pole 201, and the ground wire 204 is allowed to enter a home through the ground distribution terminal 202.
  • FIG. 6 is a diagram showing the construction of an SMPS that is also used in xDSL. In accordance with the prior art, a surge protection method using MOV is applied only to both ends of power input.
  • the conventional SMPS is provided with an outlet having no ground terminal, so that ground cannot be achieved.
  • surge limiting elements Mu and M12 are additionally provided and connected to both ends of power lines, and the neutral point of the surge limiting elements Mu and M ⁇ 2 is connected to the (-) line of the DC output terminals of the SMPS.
  • a modem or equipment using DC power output is naturally connected not only to the ground side of equipment but also to the above-described pseudo-ground line, so that perfect protection for the SMPS can be achieved.
  • the correlation between a signal ground SG and a frame ground FG is not influenced by the filters that are employed in an
  • the coils Lu and L 23 of the interface unit 14 violates a separate ground method (IBM's recommendation for the ground of a PC) at the time of application of the above-described pseudo- ground method, so that a method for fundamentally coping with low frequency noise that may be induced to communication lines is provided.
  • This method functions to balance a voltage difference when the voltage difference occurs between the two lines L x and L 2 .
  • the source of a surge which may be induced to a home, includes a ring type transient phenomenon that occurs at the time of operation of an electrical motor.
  • the surge is a surge (IEV 826-02-01) that the peak voltage and frequency thereof decreases and disappears from a period of 100 KHz, and may be interpreted by the above-described interpretation of a surge basic waveform.
  • the sources of the potential difference in a communication cable section or between communication cables and power lines include lightning, a surge or a ground fault.
  • Surges in communication and power line sections are exemplified by a transversal current due to the balance of lines and a longitudinal current that is induced between the lines and the ground.
  • the coils L 22 and L 23 of the interface unit 14 are connected in series between the two lines, and the central connection point therebetween is connected to the pseudo-ground G, so that the balance between the lines can be achieved and an equipotential loop can be formed, thus overcoming the above-described voltage difference between the lines.
  • the present invention relates, in general, to an apparatus for protecting communication equipment from lightning and surges that is capable of grounding balanced lines without the influence of noise at the time of realizing ground so as to improve the stability of a network by preventing various noise, lightning and surges in the network using a balanced cable, such as telephone lines or a UTP cable, and, more particularly, to an apparatus for protecting the terminals of x Digital Subscriber Line using a telephone signal and a data signal in an overlapped fashion and dedicated lines using a balanced cable from lightning and surges.
  • a balanced cable such as telephone lines or a UTP cable

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Telephonic Communication Services (AREA)

Abstract

La présente invention a trait à un appareil pour la protection de dispositif de communication de la foudre et de surtensions. L'appareil comporte une unité de protection primaire (11), une unité de limitation de courant (12), une unité de filtre passe-haut (13), une unité d'interface (14) et une unité de protection secondaire (15). L'unité de protection primaire (11) assure la protection des circuits contre une surtension. L'unité de limitation de courant (12) assure la limitation de la surtension à une valeur prédéterminée. L'unité de filtre passe-haut (13) assure la séparation des signaux de données haute fréquence uniquement de divers signaux. L'unité d'interface (14) est reliée à l'unité de filtre passe-haut (13) pour l'élimination de bruit de ligne, adaptée à la mise en oeuvre d'une pseudo-masse par la réalisation de potentiels égaux entre les lignes et la masse, et adaptée à la transmission des signaux de données vers une unité de sortie. L'unité de protection secondaire (15) assure le blocage de surtensions par la suppression du potentiel résiduel de l'unité de protection primaire (11) après l'unité d'interface (14)
PCT/KR2004/003487 2003-12-30 2004-12-29 Appareil pour la protection de dispositif de communication de la foudre et de surtension WO2005064760A1 (fr)

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KR20030099782 2003-12-30
KR10-2003-0099782 2003-12-30
KR10-2004-0058605 2004-07-27
KR1020040058605A KR100476696B1 (ko) 2003-12-30 2004-07-27 통신기기의 낙뢰 및 써지 보호장치

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009116849A2 (fr) * 2008-03-17 2009-09-24 Pak Chuen Chang Appareil de protection pour interface électrique
CN102946203A (zh) * 2011-08-08 2013-02-27 西门子公司 保护隔离的电源
CN102135575B (zh) * 2010-01-27 2013-06-19 中国电信股份有限公司 一种检验调制解调器终端雷电防护能力的装置和方法
EP2375877A3 (fr) * 2010-04-06 2013-10-09 Tyco Electronics Corporation Ensemble planaire de protection contre la tension
EP2854249A4 (fr) * 2012-06-28 2015-06-03 Zte Corp Circuit de protection d'interface de communication
JP2022132697A (ja) * 2020-06-26 2022-09-09 株式会社オートネットワーク技術研究所 受信装置
WO2023192612A1 (fr) * 2022-04-01 2023-10-05 NexTek, LLC Circuit de filtre passe-bande avec protection contre les surtensions

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5289335A (en) * 1989-01-21 1994-02-22 Central Lightning Protection Co. Ltd. Compound lightning arrester for low voltage circuit
JPH0941723A (ja) * 1995-08-03 1997-02-10 Shiyouden:Kk 情報通信機器の耐雷設置装置
KR200205720Y1 (ko) * 2000-05-31 2000-12-01 이준우 전자파 차단 콘센트 장치
JP2001197679A (ja) * 2000-01-07 2001-07-19 Nippon Telegraph & Telephone East Corp 雷防護機能付無停電電源装置
KR200263733Y1 (ko) * 2001-10-29 2002-02-09 한국전력공사 변전설비의 서지 방지장치
KR200303175Y1 (ko) * 2002-10-25 2003-02-06 김영수 낙뢰방지 기능을 갖는 필터장치

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5289335A (en) * 1989-01-21 1994-02-22 Central Lightning Protection Co. Ltd. Compound lightning arrester for low voltage circuit
JPH0941723A (ja) * 1995-08-03 1997-02-10 Shiyouden:Kk 情報通信機器の耐雷設置装置
JP2001197679A (ja) * 2000-01-07 2001-07-19 Nippon Telegraph & Telephone East Corp 雷防護機能付無停電電源装置
KR200205720Y1 (ko) * 2000-05-31 2000-12-01 이준우 전자파 차단 콘센트 장치
KR200263733Y1 (ko) * 2001-10-29 2002-02-09 한국전력공사 변전설비의 서지 방지장치
KR200303175Y1 (ko) * 2002-10-25 2003-02-06 김영수 낙뢰방지 기능을 갖는 필터장치

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009116849A2 (fr) * 2008-03-17 2009-09-24 Pak Chuen Chang Appareil de protection pour interface électrique
WO2009116849A3 (fr) * 2008-03-17 2009-12-23 Pak Chuen Chang Appareil de protection pour interface électrique
CN102135575B (zh) * 2010-01-27 2013-06-19 中国电信股份有限公司 一种检验调制解调器终端雷电防护能力的装置和方法
EP2375877A3 (fr) * 2010-04-06 2013-10-09 Tyco Electronics Corporation Ensemble planaire de protection contre la tension
CN102946203A (zh) * 2011-08-08 2013-02-27 西门子公司 保护隔离的电源
US8913355B2 (en) 2011-08-08 2014-12-16 Siemens Aktiengesellschaft Totally insulated switched mode power supply
EP2854249A4 (fr) * 2012-06-28 2015-06-03 Zte Corp Circuit de protection d'interface de communication
US9496705B2 (en) 2012-06-28 2016-11-15 Zte Corporation Protection circuit of communication interface
JP2022132697A (ja) * 2020-06-26 2022-09-09 株式会社オートネットワーク技術研究所 受信装置
WO2023192612A1 (fr) * 2022-04-01 2023-10-05 NexTek, LLC Circuit de filtre passe-bande avec protection contre les surtensions

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